Optical touch device and light source assembly

ABSTRACT

An optical touch device includes a sensing area, a first linear light source disposed next to a first side of the sensing area, a light penetration and reflection component disposed between the first linear light source and the first side, and a light sensing component configured to have a field of view of the entire sensing area. The light penetration and reflection component includes a substrate and a light penetration and reflection structure disposed on the substrate. The light penetration and reflection structure includes a plurality of prime pillars protruding from a surface, opposite to the first linear light source, of the substrate and thereby forming a plurality of reflection regions and light penetration regions. The prism pillars each are configured to have a length direction parallel to the first side. Each prime pillar has at least a reflection surface. The reflection surfaces are included in the reflection regions.

TECHNICAL FIELD

The present invention relates to a touch device, and more particularlyto an optical touch device and a light source assembly thereof.

BACKGROUND

Touch function has become one of the essential features of many today'selectronic devices, and touch device is one of the common electronicdevices capable of realizing the touch function. Basically, the presenttouch devices are categorized to: resistive type, capacitive type andoptical type. Thus, various electronic devices can adopt various typesof touch device based on different touch requirements.

FIG. 1 is a schematic structure view of a conventional optical touchdevice. As shown, the conventional optical touch device 100 includes alight guide set 110, a light emitting component 120 and a light sensingcomponent 130. The light guide set 110 includes two light guide strips112 a, 112 b and a strip mirror 114. The light guide strips 112 a, 112 band the strip mirror 114 are arranged respectively along three of foursides of a rectangular trajectory; wherein the light guide strip 112 ais configured to be opposite to the strip mirror 114, the light guidestrips 112 b is configured to be connected between the light guide strip112 a and the strip mirror 114, and the area within the rectangulartrajectory is defined as a sensing area 116. In addition, the lightemitting component 120 is disposed between the two adjacent ends of thelight guide strips 112 a, 112 b and configured to provide lights toinside the light guide strips 112 a, 112 b. The light guide strips 112a, 112 b each is configured to direct the lights from the light emittingcomponent 120 to the sensing area 116. The light sensing component 130is disposed near to one end of the light guide strip 112 a andconfigured to have a field of view (FOV) of the entire sensing area 116.

The light sensing component 130 is configured to detect a light-blockingobject in the sensing area 116 and determine the light-blocking object'position. As shown in FIG. 1, for example, a touch point (or,light-blocking object) A is located in the sensing area 116, and acorresponding mirroring point A1 is formed on the strip mirror 114.Accordingly, a dark point A2, derived from the touch point A, and a darkpoint A3, derived from the mirroring point A1, are generated. Throughdetecting the two dark points A2, A3, the light sensing component 130can obtain the distances d1, d2. And thus, the position (or, coordinate)of the touch point A can be obtained from the distances d1, d2, someknown parameters such as the length of the X-axis of the sensing area116, the width of the Y-axis of the sensing area 116, and some knownconditions such as the shortest distance from the touch point A to thestrip mirror 114 being equal to the shortest distance from the mirroringpoint A1 to the strip mirror 114. The means for the calculation of acoordinate are apparent to those ordinarily skilled in the art; no anyunnecessary detail will be given here.

However, the conventional optical touch device 100 may have a blind zone150 which is located near the lower left corner of the sensing are 116;wherein the blind zone means a specific area, in which the touch point'scoordinate is difficult to be accurately calculated. For example, asshown in FIG. 1, a touch point B is located in the blind zone 150 of thesensing area 116 and a corresponding mirroring point B1 is formed on thestrip mirror 114. Accordingly, the dark point B2, derived from the touchpoint B, and a dark point B3, derived from the mirroring point B1, mayoverlap; so, the coordinate of the touch point B is difficult to becalculated accurately.

SUMMARY OF EMBODIMENTS

Therefore, one object of the present invention is to provide an opticaltouch device to avoid the blind zone issue.

Another object of the present invention is to provide a light sourceassembly adopted in an optical touch device to solve the blind zoneissue.

Still another object of the present invention is to provide a lightsource assembly adopted in an optical touch device to solve the blindzone issue.

The present invention provides an optical touch device, which includes asensing area, a first linear light source, a light penetration andreflection component and a light sensing component. The first linearlight source is disposed next to a first side of the sensing area. Thelight penetration and reflection component is disposed between the firstlinear light source and the first side. The light penetration andreflection component includes a substrate and a light penetration andreflection structure disposed on the substrate. The light penetrationand reflection structure includes a plurality of prime pillarsprotruding from a surface, opposite to the first linear light source, ofthe substrate and thereby forming a plurality of reflection regions anda plurality of light penetration regions. The prism pillars each areconfigured to have a length direction parallel to the first side. Eachprime pillar has at least a reflection surface. The reflection surfacesare included in the reflection regions. The light sensing component isconfigured to have a field of view of the entire sensing area.

In an embodiment of the present invention, each prism pillar has tworeflection surfaces configured to be titled and connected to each other.Each adjacent two prime pillars are configured to have a gaptherebetween. The gaps are included in the light penetration regions.

In an embodiment of the present invention, each prism pillar has tworeflection surfaces, configured to be titled to each other, and a lightpenetration portion, configured to be connected between the tworeflection surfaces. The light penetration portions are included in thelight penetration regions.

In an embodiment of the present invention, the light penetration portionis configured to have a curve or a flat structure.

In an embodiment of the present invention, each adjacent two primepillars are configured to be connected to each other.

In an embodiment of the present invention, one of the light penetrationportions is configured to have an orthogonal projection area A1 on thesurface of the substrate; the prism pillar is configured to have an areaA2 on the surface of the substrate; and 1/20≦A1/A2≦⅕.

In an embodiment of the present invention, each adjacent two primepillars are configured to have a gap therebetween, the gaps are includedin the light penetration regions.

In an embodiment of the present invention one of the light penetrationportions is configured to have an orthogonal projection area A1 on thesurface of the substrate; the prism pillar is configured to have an areaA2 on the surface of the substrate; the gap is configured to have anarea of A3; and 1/20≦(A1/A3)/A2≦⅕.

In an embodiment of the present invention, each prism pillar isconfigured to have a plurality of V-shaped grooves disposed on a topsurface thereof opposite to the first leaner light source. Each V-shapedgroove is configured to have two groove walls. The groove walls of theV-shaped grooves are included in the reflection surfaces. The lightpenetration and reflection structure further includes a plurality ofplatforms configured to protrude from the surface of the substrateopposite to the linear light source. The platforms and the prism pillarsare arranged alternately. The platforms are included in the lightpenetration regions.

In an embodiment of the present invention, the light penetration andreflection structure is formed in a central area of the surface of thesubstrate.

In an embodiment of the present invention, the aforementioned opticaltouch device further includes a second linear light source disposed nextto a second side of the sensing area. The second side is configured tobe opposite to the first side.

In an embodiment of the present invention, the aforementioned opticaltouch device further includes a third linear light source and a mirror.The third linear light source is disposed next to a third side of thesensing area. The third side is configured to be connected between thefirst and second sides. The light sensing component is disposed in aconnection area of the second and third sides. The mirror is disposednext to a fourth side of the sensing area. The fourth side is configuredto be opposite to the third side.

In an embodiment of the present invention, the aforementioned opticaltouch device further includes a display panel. The sensing area isformed on a display surface of the display panel.

In an embodiment of the present invention, the aforementioned opticaltouch device further includes a plate, on which the sensing area isformed.

The present invention further provides a light source assembly of anoptical touch device, which includes a linear light source and a lightpenetration and reflection component. The linear light source isdisposed next to a side of a sensing area of the optical touch device.The light penetration and reflection component is disposed between thefirst linear light source and the side. The light penetration andreflection component includes a substrate and a light penetration andreflection structure disposed on the substrate. The light penetrationand reflection structure includes a plurality of prime pillarsprotruding from a surface, opposite to the first linear light source, ofthe substrate and thereby forming a plurality of reflection regions anda plurality of light penetration regions. The prism pillars each areconfigured to have a length direction parallel to the side. Each primepillar has at least a reflection surface. The reflection surfaces areincluded in the reflection regions.

The present invention still provides a light source assembly of anoptical touch device, which includes a linear light source and a lightpenetration and reflection component. The linear light source isdisposed next to a side of a sensing area of the optical touch device.The light penetration and reflection component is disposed between thelinear light source and the side. The light penetration and reflectioncomponent includes a plurality of optical micro-structures. Each opticalmicro-structure includes a top portion, a bottom portion and at least areflection surface. The top portion is configured to be opposite to thelinear light source. The reflection surface(s) is configured to beconnected between the top portion and the bottom portion. At least oneof the top portion and the bottom portion has a flat region. Eachreflection surface is configured to be titled relative to the flatregion(s).

In an embodiment of the present invention, the optical micro-structureis a triangular pillar, a trapezoidal pillar, or a combination of thetriangular pillar and the trapezoidal pillar.

In an embodiment of the present invention, the bottom portion of eachoptical micro-structure is the flat region. The top portion has aplurality of V-shaped grooves. Each V-shaped groove is configured tohave two groove walls. The groove walls of the V-shaped grooves are thereflection surface.

In an embodiment of the present invention, the linear light sourceincludes a light guide strip. The top portions of the opticalmicro-structures are configured to be connected to the light guidestrip.

In an embodiment of the present invention, each adjacent two opticalmicro-structures are configured to be connected to each other.

In an embodiment of the present invention, each adjacent two opticalmicro-structures are configured to have a distance therebetween.

In summary, the optical touch device according to the embodiments of thepresent invention is implemented with a conventional optical touchdevice and a light source assembly, which is constituted by a lightpenetration and reflection component and an extra linear light source;wherein the linear light source is disposed opposite to the lightpenetration and reflection component and configured to enhance lightsource. According to the aforementioned structure, the optical touchdevice of the present invention can calculate the position coordinate ofa touch point (or, a light-blocking object) more accurately so as tosolve the blind zone issue. Thus, the optical touch device adopting thelight source assembly of the present embodiment avoids the blind zoneissue occurring in the conventional optical touch device, and theobjects of the developments of the present invention are realized.

BRIEF DESCRIPTION OF THE DRAWINGS

The above embodiments will become more readily apparent to thoseordinarily skilled in the art after reviewing the following detaileddescription and accompanying drawings, in which:

FIG. 1 is a schematic structure view of a conventional optical touchdevice;

FIG. 2 is a schematic structure view of an optical touch device inaccordance with a first embodiment of the present invention;

FIG. 3A is a schematic partial three-dimensional view in a region R ofthe light penetration and reflection component shown in FIG. 2;

FIG. 3B is a schematic cross-sectional view of the optical touch devicealong a line E-E in FIG. 2;

FIG. 4 is a schematic view illustrating that the sensing area having alight-blocking object located thereon;

FIG. 5 is a schematic view illustrating light penetration paths andreflection paths associated with a light penetration and reflectioncomponent;

FIG. 6 is a schematic structure view of a light penetration andreflection structure in accordance with an embodiment of the presentinvention;

FIG. 7 is a schematic structure view of a light penetration andreflection structure in accordance with another embodiment of thepresent invention;

FIG. 8 is a schematic structure view of a light penetration andreflection structure in accordance with another embodiment of thepresent invention; and

FIG. 9 is a schematic structure view of a light penetration andreflection structure in accordance with another embodiment of thepresent invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The disclosure will now be described more specifically with reference tothe following embodiments. It is to be noted that the followingdescriptions of preferred embodiments are presented herein for purposeof illustration and description only. It is not intended to beexhaustive or to be limited to the precise form disclosed.

FIG. 2 is a schematic structure view of an optical touch device inaccordance with a first embodiment of the present invention. As shown,the optical touch device 200 includes a sensing area 210, a linear lightsource 220, a light penetration and reflection component 230 and a lightsensing component 240. The linear light source 220 is disposed next to afirst side 2100 of the sensing area 210. The light penetration andreflection component 230 is disposed between the linear light source 220and the first side 2100 of the sensing area 210. The light sensingcomponent 240 is configured to have a field of view (FOV) of entire/ ormost of the sensing area 210.

FIG. 3A is a schematic partial three-dimensional view in a region R ofthe light penetration and reflection component 230 shown in FIG. 2.Please refer to FIGS. 2, 3A. The light penetration and reflectioncomponent 230 includes a substrate 231 and a light penetration andreflection structure 232 disposed on the substrate 231. The lightpenetration and reflection structure 232 includes a plurality of prismpillars 2320, each protrudes from a surface 2310 (shown in FIG. 2) ofthe substrate 231 and configured to be opposite to the linear lightsource 220. The light penetration and reflection structure 232 includesa plurality of reflection regions 2321 and a plurality of lightpenetration regions 2322. Each prism pillar 2320 is configured to have alength direction L parallel to the first side 2100 of the sensing area210. Each prism pillar 2320 has at least one reflection surface 2323,and these reflection surfaces 2323 are includes in the reflectionregions 2321 of the prism pillars 2320. The structure of the opticaltouch device 200 is further described in detail in the following.

Please refer back to FIG. 2. The optical touch device 200 furtherincludes linear light sources 250, 260 and a mirror 270. The linearlight source 250 is disposed next to a second side 2500 of the sensingarea 210; wherein the second side 2500 is configured to be opposite tothe first side 2100. The linear light source 260 is disposed next to athird side 2600 of the sensing area 210; wherein the third side 2600 isconfigured to be connected between the first side 2100 and the secondside 2500. The light sensing component 240 is disposed in a connectionarea of the second side 2500 and the third side 2600. The mirror 270 isdisposed next to a fourth side 2700 of the sensing area 210; wherein thefourth side 2700 is configured to be opposite to the third side 2600. Inthe embodiment of the optical touch device 200, the linear light sources220, 260 are configured to emit lights at a same time point and thelinear light source 250 is configured to emit lights at another timepoint. Specifically, the linear light source 250 and the linear lightsourcew220, 260 are configured to emit lights alternately. However, itis to be noted that the present invention does not limit the emissionmode (or, the emission sequence) of the linear light sourcew220, 250 and260. In addition, the light penetration and reflection structure 232 is,for example, formed in a central area of the surface 2310 of thesubstrate 231.

FIG. 3B is a schematic cross-sectional view of the optical touch device200 along a line E-E in FIG. 2. As shown in FIGS. 2, 3B, the sensingarea 210 is an area on a plate 300 and surrounded by the linear lightsources 220, 250 and 260, the light penetration and reflection component230, the mirror 270 and the light sensing component 240. In anotherembodiment, a display panel (not shown) is disposed on the plate 300 andon which the sensing area 210 is disposed.

FIG. 4 is a schematic view illustrating that the sensing area 210 havinga light-blocking object located thereon. FIG. 5 is a schematic viewillustrating light penetration paths and reflection paths associatedwith the light penetration and reflection component 230. It is to benoted that the components/devices illustrated in FIG. 4 are similar tothat in FIG. 2, so no any unnecessary detail will be given here. Inaddition, to prevent the blind zone issue, the optical touch device 200of the present embodiment further includes the light penetration andreflection component 230 and an extra linear light source (for example,the linear light source 250), compared with the conventional opticaltouch device 100 shown in FIG. 1; wherein the light penetration andreflection components 230 and the linear light source 250 are configuredto be opposite to each other. Moreover, it is to be noted that even thelight penetration and reflection components 230 is disposed between thelinear light source 220 and the sensing area 210, the lights emittedfrom the linear light source 220 still can penetrate the lightpenetration and reflection components 230 through the light penetrationregions 2322 thereof (as shown the light penetration paths designated byX in FIG. 5). A light-blocking object C is located in the light sensingarea 210, and a corresponding mirroring point C1 is formed on the mirror270. However, due to the light-blocking object C is located in the blindzone 280, the dark points C2, C3 (respectively derived from thelight-blocking object C and the mirroring point C1) may partiallyoverlap. Accordingly, the light sensing component 240 may obtain limitedoptical information from the overlapped dark points C2, C3. In thestructure of the optical touch device 200, because the light penetrationand reflection component 230 can also, due to the reflection regions2321 thereof, function as a mirror, a mirroring point C4 is formed bythe light penetration and reflection component 230 when thelight-blocking object C is being emitted by the linear light source 250,and simultaneously the lights emitted from the linear light source 250can be reflected to the light sensing component 240 by the reflectionsurfaces 2323 of the reflection regions 2321 of the light penetrationand reflection component 230 (as shown the reflection paths designatedby Y in FIG. 5). Therefore, the light sensing component 240 can further,besides the overlapped dark points C2, C3, obtain the opticalinformation of the dark point C5 according to the lights reflected fromthe light penetration and reflection component 230. Thus, the lightsensing component 240 can, according to the optical informationassociated with the dark points C2, C3 and C5 (herein, the dark pointsC2, C3 overlap and are counted as one dark point), calculate theposition coordinate of the light-blocking object C on the sensing area210 more accurately. The means for the calculation of the positioncoordinate are apparent to those ordinarily skilled in the art; no anyunnecessary detail will be given here. In addition, the linear lightsource 250 in this embodiment as illustrated in FIG. 4 is specificallyconfigured to enhance the lights emitting to the area 280; however, itis understood that the linear light source 250 can be configured toprovide lights for the entire sensing area 210 (or, configured to have astructure opposite to the entire second side 2500 of the sensing area210). Based on the same manner, the light penetration and reflectionstructure 232 can be configured to have a structure opposite to theentire first side 2100 of the sensing area 210.

The light penetration and reflection structure according to the presentinvention may have some modulations; followings are the detaileddescriptions of the light penetration and reflection structurestructures according to various embodiments.

Please refer to FIG. 6, which is a schematic structure view of a lightpenetration and reflection structure in accordance with an embodiment ofthe present invention and for a detailed description of the lightpenetration and reflection structure 232 shown in FIG. 3A. As shown, thelight penetration and reflection structure 232 includes a plurality ofprism pillars 2320. Each prism pillar 2320 has two reflection surfaces2323 and a light penetration portion 2324; wherein the two reflectionsurfaces 2323 are configured to be titled to each other, and the lightpenetration portion 2324 is configured to be connected between the tworeflection surfaces 2323. Each adjacent two prism pillars 2320 areconfigured to be connected to each other. These light penetrationportions 2324 are included in the light penetration regions 2322 shownin FIG. 3A, and each light penetration portion 2324 has, for example, aflat or a curve structure. In particular, each light penetration portion2324 is configured to have an orthogonal projection area D1 on thesurface 2310 of the substrate 231, and each prism pillar 2320 isconfigured to have an area D2 on the surface 2310 of the substrate 231;wherein 1/20≦D1/D2≦⅕. It is understood that the aforementioned ratiovalue is only an example in this embodiment, and the ratio value can bemodulated based on actual requirements in other embodiments. However, itis to be noted that, if D1/D2 is configured to be smaller than 1/20, thepenetrated lights may not be sufficient enough and thereby affecting thesensitivities of the light sensing component 240 detecting the darkpoints; alternatively, if D1/D2 is configured to be greater than ⅕, thearea of the reflection surfaces 2323 may be relatively small and therebyalso affecting the sensitivities of the light sensing component 240detecting the dark points.

FIG. 7 is a schematic structure view of a light penetration andreflection structure in accordance with another embodiment of thepresent invention. As shown, the light penetration and reflectionstructure 232 a includes a plurality of prism pillars 2320; wherein theprism pillars 2320 in FIG. 7 each has a structure same as the prismpillar 2320 (constituted by two reflection surfaces 2323 and one lightpenetration portion 2324) in FIG. 6 has. Specifically, each adjacent twoprism pillars 2320 are configured to have a gap 2325 therebetween, andthese gaps 2325 are included in the light penetration regions 2322 shownin FIG. 3A. In the light penetration and reflection structure 232 a,each light penetration portion 2324 is configured to have an orthogonalprojection area E1 on the surface 2310 of the substrate 231, each prismpillar 2320 is configured to have an area E2 on the surface 2310 of thesubstrate 231, and each gap 2325 is configured to have an area E3;wherein 1/20≦(E1+E3)/E2≦⅕. It is understood that the aforementionedratio value is only an example in this embodiment, and the ratio valuecan be modulated based on actual requirements in other embodiments.However, it is to be noted that, if (E1+E3)/E2 is configured to besmaller than 1/20, the penetrated lights may not be sufficient enoughand thereby affecting the sensitivities of the light sensing component240 detecting the dark points; alternatively, if (E1+E3)/E2 isconfigured to be greater than ⅕, the area of the reflection surfaces2323 may be relatively small and thereby also affecting thesensitivities of the light sensing component 240 detecting the darkpoints.

Please refer to FIG. 8, which is a schematic structure view of a lightpenetration and reflection structure in accordance with anotherembodiment of the present invention. As shown, the light penetration andreflection structure 232 b includes a plurality of prism pillars 2320 b.Each prism pillar 2320 b has two reflection surfaces 2323 b, which areconfigured to be connected and titled to each other. Each adjacent twoprism pillars 2320 b are configured to have a gap 2324 b therebetween,and these gaps 2324 b are included in the light penetration regions 2322in FIG. 3A.

Please refer to FIG. 9, which is a schematic structure view of a lightpenetration and reflection structure in accordance with anotherembodiment of the present invention. As shown, the light penetration andreflection structure 232 c includes a plurality of prism pillars 2320 c.Each prism pillar 2320 c has a plurality of V-shaped grooves 2327 on atop surface 2326 thereof; wherein the top surface 2326 is configured tobe opposite to a linear light source (for example, the linear lightsource 220 in FIG. 2). Each V-shaped groove 2327 has two groove walls2328. The groove walls 2328 associated with a same prism pillar 2320 care included in a reflection surface 2323 c of the associated prismpillar 2320 c. In addition, the light penetration and reflectionstructure 232 c further includes a plurality of platforms 2329, each isconfigured to protrude from the surface 2310 of the substrate 231opposite to the linear light source 200. The platforms 2329 and theprism pillars 2320 c are arranged alternatively on the surface 2310. Inaddition, the platforms 2329 are included in the light penetrationregions 2322 shown in FIG. 3A.

According to the aforementioned various light penetration and reflectionstructures disclosed in the embodiments illustrated in FIGS. 6, 7, 8 and9, each light penetration and reflection structure includes a pluralityof prism pillars; wherein the prism pillar herein is defined as anoptical micro-structure. In the embodiments, each opticalmicro-structure includes a top portion, a bottom portion and at leastone reflection surface; wherein the top portion is configured to beopposite to a linear light source (for example, the linear light source220 in FIG. 2) and the reflection surface is configured to be connectedto the top portion and the bottom portion. At least one of the top andbottom portions includes a flat region, and the reflection surface isconfigured to be tilted relative to the flat region. For example, in theembodiments illustrated in FIGS. 6, 7, the optical micro-structure (or,the prism pillar 2320) in the light penetration and reflectionstructures 232, 232 a is a trapezoidal pillar structure and the top andbottom portions thereof both have a flat region. In the embodimentillustrated in FIG. 8, the optical micro-structure (or, the prism pillar2320 b) of the light penetration and reflection structure 232 b is atriangle pillar structure and the bottom portion thereof has a flatregion. In the embodiment illustrated in FIG. 9, the opticalmicro-structure (or, the prism pillar 2320 c) of the light penetrationand reflection structure 232 c is a structure having a flat region onits bottom portion and a plurality of V-shaped grooves on its topportion; wherein the V-shaped grooves includes a plurality of groovewalls, each serves as a reflection surface. In addition, the variouslight penetration and reflection structures disclosed in theaforementioned embodiments each is disposed between a linear lightsource (for example, the linear light source 220 in FIG. 2) and one sideof a sensing area (for example, the sensing area 210 in FIG. 2); whereinthe linear light source includes a light guide strip, and the prismpillars (or, the optical micro-structures) of the light penetration andreflection structure each is configured to have its top portionconnected to the light guide strip.

In the aforementioned embodiments, the light penetration and reflectioncomponent 230 is exemplified by having the light penetration andreflection structures 232, 232 a, 232 b or 232 c disposed on thesubstrate 231. In another embodiment, the light penetration andreflection component 230 may include the light penetration andreflection structure only without the substrate 231. It is to be notedthat the light penetration and reflection component 230 without thesubstrate 231 still can provide full functions as the light penetrationand reflection component 230 with the substrate 231 does.

Moreover, the light penetration and reflection component 230 and thelinear light source 220 in the embodiments can be referred to as a lightsource assembly.

In summary, the optical touch device according to the embodiments of thepresent invention is implemented with a conventional optical touchdevice and a light source assembly, which is constituted by a lightpenetration and reflection component and an extra linear light source;wherein the linear light source is disposed opposite to the lightpenetration and reflection component and configured to enhance lightsource. According to the aforementioned structure, the optical touchdevice of the present invention can calculate the position coordinate ofa touch point (or, a light-blocking object) more accurately so as tosolve the blind zone issue. Thus, the optical touch device adopting thelight source assembly of the present embodiment avoids the blind zoneissue occurring in the conventional optical touch device, and theobjects of the developments of the present invention are realized.

While the disclosure has been described in terms of what is presentlyconsidered to be the most practical and preferred embodiments, it is tobe understood that the disclosure needs not be limited to the disclosedembodiment. On the contrary, it is intended to cover variousmodifications and similar arrangements included within the spirit andscope of the appended claims which are to be accorded with the broadestinterpretation so as to encompass all such modifications and similarstructures.

What is claimed is:
 1. An optical touch device, comprising: a sensingarea; a first linear light source disposed next to a first side of thesensing area; a light penetration and reflection component disposedbetween the first linear light source and the first side, the lightpenetration and reflection component comprising a substrate and a lightpenetration and reflection structure disposed on the substrate, thelight penetration and reflection structure comprising a plurality ofprime pillars protruding from a surface, opposite to the first linearlight source, of the substrate and thereby forming a plurality ofreflection regions and a plurality of light penetration regions, theprism pillars each being configured to have a length direction parallelto the first side, each prime pillar comprising at least a reflectionsurface, the reflection surfaces being included in the reflectionregions; and a light sensing component configured to have a field ofview of the entire sensing area.
 2. The optical touch device accordingto claim 1, wherein each prism pillar comprises two reflection surfacesconfigured to be titled and connected to each other, each adjacent twoprime pillars are configured to have a gap therebetween, and the gapsare included in the light penetration regions.
 3. The optical touchdevice according to claim 1, wherein each prism pillar comprises tworeflection surfaces, configured to be titled to each other, and a lightpenetration portion, configured to be connected between the tworeflection surfaces, the light penetration portions are included in thelight penetration regions.
 4. The optical touch device according toclaim 3, wherein the light penetration portion is configured to have acurve or a flat structure.
 5. The optical touch device according toclaim 3, wherein each adjacent two prime pillars are configured to beconnected to each other.
 6. The optical touch device according to claim5, wherein one of the light penetration portions is configured to havean orthogonal projection area A1 on the surface of the substrate, theprism pillar is configured to have an area A2 on the surface of thesubstrate, and 1/20≦A1/A2≦⅕.
 7. The optical touch device according toclaim 3, wherein each adjacent two prime pillars are configured to havea gap therebetween, the gaps are included in the light penetrationregions.
 8. The optical touch device according to claim 7, wherein oneof the light penetration portions is configured to have an orthogonalprojection area A1 on the surface of the substrate, the prism pillar isconfigured to have an area A2 on the surface of the substrate, the gapis configured to have an area of A3, and 1/20≦(A1/A3)/A2≦⅕.
 9. Theoptical touch device according to claim 1, wherein each prism pillar isconfigured to have a plurality of V-shaped grooves disposed on a topsurface thereof opposite to the first leaner light source, each V-shapedgroove is configured to have two groove walls, the groove walls of theV-shaped grooves are included in the reflection surfaces, the lightpenetration and reflection structure further comprises a plurality ofplatforms configured to protrude from the surface of the substrateopposite to the linear light source, the platforms and the prism pillarsare arranged alternately, the platforms are included in the lightpenetration regions.
 10. The optical touch device according to claim 1,wherein the light penetration and reflection structure is formed in acentral area of the surface of the substrate.
 11. The optical touchdevice according to claim 1, further comprising a second linear lightsource disposed next to a second side of the sensing area, wherein thesecond side is configured to be opposite to the first side.
 12. Theoptical touch device according to claim 11, further comprising: a thirdlinear light source disposed next to a third side of the sensing area,the third side being configured to be connected between the first andsecond sides, the light sensing component being disposed in a connectionarea of the second and third sides; and a mirror disposed next to afourth side of the sensing area, wherein the fourth side is configuredto be opposite to the third side.
 13. The optical touch device accordingto claim 1, further comprising a display panel, the sensing area isformed on a display surface of the display panel.
 14. The optical touchdevice according to claim 1, further comprising a plate, on which thesensing area is formed.
 15. A light source assembly of an optical touchdevice, comprising: a linear light source disposed next to a side of asensing area of the optical touch device; and a light penetration andreflection component disposed between the first linear light source andthe side, the light penetration and reflection component comprising asubstrate and a light penetration and reflection structure disposed onthe substrate, the light penetration and reflection structure comprisinga plurality of prime pillars protruding from a surface, opposite to thefirst linear light source, of the substrate and thereby forming aplurality of reflection regions and a plurality of light penetrationregions, the prism pillars each being configured to have a lengthdirection parallel to the side, each prime pillar comprising at least areflection surface, the reflection surfaces being included in thereflection regions.
 16. A light source assembly of an optical touchdevice, comprising: a linear light source disposed next to a side of asensing area of the optical touch device; and a light penetration andreflection component disposed between the linear light source and theside, the light penetration and reflection component comprising aplurality of optical micro-structures, each optical micro-structurecomprising a top portion, a bottom portion and at least a reflectionsurface, the top portion being configured to be opposite to the linearlight source, the reflection surface(s) being configured to be connectedbetween the top portion and the bottom portion, at least one of the topportion and the bottom portion comprising a flat region, each reflectionsurface being configured to be titled relative to the flat region(s).17. The light source assembly of an optical touch device according toclaim 16, wherein the optical micro-structure is a triangular pillar, atrapezoidal pillar, or a combination of the triangular pillar and thetrapezoidal pillar.
 18. The light source assembly of an optical touchdevice according to claim 16, wherein the bottom portion of each opticalmicro-structure is the flat region, the top portion comprises aplurality of V-shaped grooves, each V-shaped groove is configured tohave two groove walls, and the groove walls of the V-shaped grooves arethe reflection surface.
 19. The light source assembly of an opticaltouch device according to claim 16, wherein the linear light sourcecomprises a light guide strip, the top portions of the opticalmicro-structures is configured to be connected to the light guide strip.20. The light source assembly of an optical touch device according toclaim 16, wherein each adjacent two optical micro-structures areconfigured to be connected to each other.
 21. The light source assemblyof an optical touch device according to claim 16, wherein each adjacenttwo optical micro-structures are configured to have a distancetherebetween.